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Technical Demonstration of Whole Genome Array Comparative Genomic Hybridization
Published on: August 5, 2008
Evaluation of low density array technology for quantitative parallel measurement of multiple genes in human tissue
Andrew B Goulter1, Daniel W Harmer, Kenneth L Clark
1Pharmagene Laboratories Ltd, Royston, Hertfordshire, SG8 5HD, UK. andrew.goulter@pharmagene.com
BMC Genomics
|March 1, 2006
Summary
Low density arrays (LDAs) offer sensitive, quantitative gene expression profiling. This novel real-time quantitative RT-PCR (QRT-PCR) approach provides accurate results for multiple genes in human samples.
Area of Science:
- Molecular Biology
- Genomics
Background:
- Low density arrays (LDAs) are a novel method for gene expression profiling.
- LDAs utilize real-time quantitative RT-PCR (QRT-PCR) for focused and sensitive gene expression studies.
- They offer higher throughput compared to traditional QRT-PCR methods.
Purpose of the Study:
- To evaluate LDAs for simultaneous multi-gene expression analysis in human tissues and cells.
- To assess the sensitivity, accuracy, and quantitative capabilities of LDAs.
Main Methods:
- Gene expression profiling using Low Density Arrays (LDAs).
- Real-time quantitative RT-PCR (QRT-PCR) as the underlying technology.
- Serial dilutions of cDNA samples to assess linearity and dynamic range.
Main Results:
- LDAs demonstrate low variability with high correlation coefficients (close to 1).
- A clear linear relationship was observed across 5 orders of magnitude for gene expression data.
- LDAs accurately detect 2-fold changes and quantify gene expression from 10^2 to 10^6 copies.
- LDA data from a cell-based study correlated well with conventional QRT-PCR.
Conclusions:
- LDAs provide a valuable new approach for gene expression profiling.
- The method is sensitive and quantitative.
- LDAs are suitable for simultaneous analysis of multiple genes.
